Board Thread:Traders' Board/@comment-32750412-20171007113044/@comment-31267872-20171013195139

(You only need to use Cotton Guard twice if you don't switch out!)

Well the thing is - you use one move slot for Cotton Guard, one move slot for a healing move, and one move slot for Giga Impact which has recharge. Also, you're in big trouble if a Pokémon uses Ice Beam on you before you Mega... Cotton Guard doesn't affect Ice Beam, so I don't know about the whole Giga Impact thing.